﻿/*
 * Copyright (C) 2010 ZXing authors
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

/*
 * These authors would like to acknowledge the Spanish Ministry of Industry,
 * Tourism and Trade, for the support in the project TSI020301-2008-2
 * "PIRAmIDE: Personalizable Interactions with Resources on AmI-enabled
 * Mobile Dynamic Environments", led by Treelogic
 * ( http://www.treelogic.com/ ):
 *
 *   http://www.piramidepse.com/
 */

using System;
using ZXing.Common;

namespace ZXing.OneD.RSS.Expanded.Decoders
{
   /// <summary>
   /// <author>Pablo Orduña, University of Deusto (pablo.orduna@deusto.es)</author>
   /// <author>Eduardo Castillejo, University of Deusto (eduardo.castillejo@deusto.es)</author>
   /// </summary>
   public abstract class AbstractExpandedDecoder
   {
      private readonly BitArray information;
      private readonly GeneralAppIdDecoder generalDecoder;

      internal AbstractExpandedDecoder(BitArray information)
      {
         this.information = information;
         this.generalDecoder = new GeneralAppIdDecoder(information);
      }

      /// <summary>
      /// Gets the information.
      /// </summary>
      /// <returns></returns>
      protected BitArray getInformation()
      {
         return information;
      }

      internal GeneralAppIdDecoder getGeneralDecoder()
      {
         return generalDecoder;
      }

      /// <summary>
      /// Parses the information.
      /// </summary>
      /// <returns></returns>
      public abstract String parseInformation();

      /// <summary>
      /// Creates the decoder.
      /// </summary>
      /// <param name="information">The information.</param>
      /// <returns></returns>
      public static AbstractExpandedDecoder createDecoder(BitArray information)
      {
         if (information[1])
         {
            return new AI01AndOtherAIs(information);
         }
         if (!information[2])
         {
            return new AnyAIDecoder(information);
         }

         int fourBitEncodationMethod = GeneralAppIdDecoder.extractNumericValueFromBitArray(information, 1, 4);

         switch (fourBitEncodationMethod)
         {
            case 4: return new AI013103decoder(information);
            case 5: return new AI01320xDecoder(information);
         }

         int fiveBitEncodationMethod = GeneralAppIdDecoder.extractNumericValueFromBitArray(information, 1, 5);
         switch (fiveBitEncodationMethod)
         {
            case 12: return new AI01392xDecoder(information);
            case 13: return new AI01393xDecoder(information);
         }

         int sevenBitEncodationMethod = GeneralAppIdDecoder.extractNumericValueFromBitArray(information, 1, 7);
         switch (sevenBitEncodationMethod)
         {
            case 56: return new AI013x0x1xDecoder(information, "310", "11");
            case 57: return new AI013x0x1xDecoder(information, "320", "11");
            case 58: return new AI013x0x1xDecoder(information, "310", "13");
            case 59: return new AI013x0x1xDecoder(information, "320", "13");
            case 60: return new AI013x0x1xDecoder(information, "310", "15");
            case 61: return new AI013x0x1xDecoder(information, "320", "15");
            case 62: return new AI013x0x1xDecoder(information, "310", "17");
            case 63: return new AI013x0x1xDecoder(information, "320", "17");
         }

         throw new InvalidOperationException("unknown decoder: " + information);
      }
   }
}
